Читать книгу Cryptocurrency All-in-One For Dummies - Peter Kent, Kiana Danial - Страница 30

Unlike PoW, a proof-of-stake (PoS) system requires you to show ownership of a certain amount of money (or stake). That means the more crypto you own, the more mining power you have. This approach eliminates the need for the expensive mining extravaganza. And because the calculations are pretty simple to prove, you own a certain percentage of the total amount of the cryptos available.

Another difference is that the PoS system offers no block rewards, so the miners get transaction fees. That’s how PoS cryptos can be several thousand times more cost-effective than PoW ones. (Don’t let the PoS abbreviation give you the wrong idea.)

But of course, PoS also has its own problems. For starters, you can argue that PoS rewards coin hoarders. Under the proof-of-stake model, nodes can mine only a percentage of transactions that corresponds to their stake in a cryptocurrency. For example, a proof-of-stake miner who owns 10 percent of a cryptocurrency would be able to mine 10 percent of blocks on the network. The limitation with this consensus model is that it gives nodes on the network a reason to save their coins instead of spending them. It also produces a scenario in which the rich get richer because large coin holders are able to mine a larger percentage of blocks on the network.